Reference "Leafy head2, which encodes a putative RNA-binding protein, regulates shoot development of rice"

Reference ID

11203

Title

Leafy head2, which encodes a putative RNA-binding protein, regulates shoot development of rice

Source

Cell research, 2006, vol. 16, pp. 267-276

Authors (8)

Xiong-G-S	Hu-X-M
Jiao-Y-Q	Yu-Y-C
Chu-C-C	Li-J-Y
Qian-Q	Wang-Y-H

Abstract

During vegetative development, higher plants continuously form new leaves in
regular spatial and temporal patterns. Mutants with abnormal leaf developmental
patterns not only provide a great insight into understanding the regulatory
mechanism of plant architecture, but also enrich the ways to its modification by
which crop yield could be improved. Here, we reported the characterization of
the rice leafy-head2 (lhd2) mutant that exhibits shortened plastochron,
dwarfism, reduced tiller number, and failure of phase transition from vegetative
to reproductive growth. Anatomical and histological study revealed that the
rapid emergence of leaves in lhd2 was resulted from the rapid initiation of leaf
primordia whereas the reduced tiller number was a consequence of the suppression
of the tiller bud outgrowth. The molecular and genetic analysis showed that LHD2
encodes a putative RNA binding protein with 67% similarity to maize TE1.
Comparison of genome-scale expression profiles between wild-type and lhd2 plants
suggested that LHD2 may regulate rice shoot development through KNOX and hormone-
related genes. The similar phenotypes caused by LHD2 mutation and the conserved
expression pattern of LHD2 indicated a conserved mechanism in controlling the
temporal leaf initiation in grass.